TR STERN DRIVE (2.00 RATIO) - II-TR 1973-1976 215H AND 215E STERN DRIVE - 215H 1970 III STERN DRIVE - III 1968-1972 II STERN DRIVE (1.78:1 GEAR RATIO) - II (1.78:1) 1968-1969 255/280 TRS - 280-TRS 1975-1976 255/280 TRS - 255-TRS 1973-1974 215H AND 215E STERN DRIVE - 215E 1970-1972 TR (200 RATIO) TRS (1.50 RATIO) STERN DRIVE - TR/TRS 1977-1993